How Yankees left intriguing prospects exposed, protected under-the-radar arm

Brian Cashman as the New York Yankees honor the 1998 World Series team in a ceremony at Yankee Stadium. 8/18/18 Bronx, N.Y. (John Munson | NJ Advance Media for NJ.com)The Yankees made a somewhat surprising move Tuesday night, shielding an under-the-radar reliever while leaving several talented youngsters dangling for other teams to pick.

They stashed right-handed reliever Joe Harvey on their 40-man roster, protecting him from the Rule 5 Draft.

First, a quick breakdown of who's available in the Rule 5, via Baseball America:

With a few exceptions, any player who was younger than 19 on June 4 of their signing year is eligible to be picked if they are not on a 40-man roster after their fifth pro…